题目

If US software(软件) companies don’t pay more attention to quality, they could kiss their business good-bye. Both India and Brazil are developing a world-class software industry. Their weapon is quality and one of their jobs is to attract the top US quality specialists whose voices are not listened to in their country.    Already, of the world’s 12 software houses that have earned the highest position in the world, seven are in India. That’s largely because they have used new methods American software specialists refused to use.  For example, for years, quality specialists, W. Edwar(8分)在“探究凸透镜成像规律”的实验中，各组使用相同焦距的凸透镜进行实验．(1)小华所在的小组实验操作规范，测量准确，该小组实验记录如下表：请你根据上表信息，求出凸透镜的焦距f=   cm． (2)小华所在的小组把蜡烛放在该凸透镜的焦点上，凸透镜固定不动，将光屏向远离凸透镜的方向移动的过程中，在光屏上观察到的现象是   ．(3)若烛焰、凸透镜、光屏放在适当位置时恰好在光屏上成清晰的像，当凸透镜位置不变，烛焰向远离凸透镜方向移动一小段距离时，为了在光屏上再成清晰的像，光屏应向   (远离／靠近)凸透镜方向移动适当的距离．(4)对于焦距相同的凸透镜，一个物距应该对应唯一的像距，但从各小组汇报数据中发现，物距均为12．00cm时，有三个小组所测像距分别为23．00cm、24．00cm、26．00cm．若他们的数据差别不是因为长度测量误差导致的，你认为出现这种情况的操作原因是